Which word refers to a point in time?

The word that refers to a point in time is "then." It is often used to signify a specific moment or sequence of events in relation to time. For example, in sentences like "We will leave the house, then we will go to the park," "then" clearly indicates the timing of actions in relation to one another.

In contrast, "than" is a conjunction used for comparisons, such as "greater than" or "less than." "When" is a question word that can specify a point in time, but it is not an adverb used to denote a moment as "then" is. "After" indicates a time that follows another point but does not specify a precise time itself. Thus, "then" most accurately captures the essence of a specific point in time.